Research of laser hybrid welding for T-joint in the box girder

Abstract

T-joint is widely used in box girder structure of lifting machinery and bridges. The welding of T-joint by use of manual arc welding has many problems, such as large deformation, operational difficulties inside the box, low productivity and so on. To solve these problems, the technical feasibility of welding for T-joint by use laser hybrid welding has been study. The results show that the single face welding-double face forming of T-joint for box girder structure can be achieved by use laser hybrid welding, and the weld quality and productivity is greatly improved.